Improved tread pattern structure of off-road motorcycle tire

Abstract

The invention discloses an improved tread pattern structure of an off-road motorcycle tire, and relates to the technical field of tires, the improved tread pattern structure is used on a tread band, and the tread band sequentially comprises a sub-tread band A, a sub-tread band B and a sub-tread band C from the middle to the two sides in the transverse direction; the sub-tread band A comprises a sub-tread band A1 and a sub-tread band A2, the sub-tread band A1 is the central part of the sub-tread band A, and the sub-tread band A2 is the other central part of the sub-tread band A; the tread band is formed by combining a plurality of same tread modules T in the circumferential direction, and the tread modules T are alternately copied in a mirror image mode in the circumferential direction of the tire and have a preset circumferential length J; the tread module T comprises a first pattern groove, a second pattern groove, a third pattern groove, a fourth pattern groove, a fifth pattern groove and a sixth pattern groove which are arranged on the opposite sides relative to the equatorial line X-X of the tire. The shape, the width, the section and the like of the pattern groove are optimally designed, so that the performance of the tire is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of tire technology, specifically to an improved tread pattern structure for off-road motorcycle tires. Background Technology

[0002] Tires are the only part of a vehicle (such as motorcycles and electric vehicles) that directly contacts the road surface. Their main functions are to bear loads, transmit the power needed for vehicle movement, ensure stable driving, and cope with different road conditions. Tire tread patterns have a significant impact on a vehicle's power / braking performance, water drainage, grip, driving comfort, and driving safety. At high speeds, vehicle tires need to simultaneously provide grip, water drainage, stability, and traction on different road surfaces. However, current tire tread patterns are relatively simple and generally suffer from the following problems: Poor performance: For medium and large displacement motorcycles, such as off-road motorcycles, a single tire tread pattern will affect the tire's grip and braking performance on the road surface, and thus cannot meet the needs of off-road motorcycles. Impact on driving safety: Small stones can easily get stuck in the existing tread grooves. Sharp stones may puncture the outer rubber layer of the tire, causing air leakage and affecting driving safety. Summary of the Invention

[0003] The first technical problem to be solved by the present invention is to provide an improved tread pattern structure for off-road motorcycle tires. By setting multiple scientific and aesthetically pleasing tread grooves and redesigning the shape, width, and cross-section of the tread grooves, the tire's performance is greatly improved, solving the problem of poor performance caused by the monotonous tread pattern of existing tires.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is implemented as follows: An improved tread pattern structure for an off-road motorcycle tire is provided for use on a tread belt, which is applied to the tire and has a land ratio of 80%-88%. The tread belt includes sub-tread belt A, sub-tread belt B, and sub-tread belt C in the lateral direction from the center to both sides. Sub-tread belt A includes sub-tread belt A1 and sub-tread belt A2, where sub-tread belt A1 is the central part of sub-tread belt A and sub-tread belt A2 is the other central part of sub-tread belt A. The tread belt is composed of multiple identical tread modules T in the circumferential direction. The tread modules T are mirror-replicated alternately along the circumferential direction of the tire and have a predetermined circumferential length J. The tread modules T include tread grooves 1, 2, 3, 4, 5, and 6 arranged on opposite sides relative to the equator XX of the tire. The ratio of sub-tread belt A to the axial width WT of the entire tread belt is 31%-37%; the ratio of sub-tread belt A1 to the axial width of the entire sub-tread belt A is 15%-22%. The ratio of the sub-tread band C to the total axial width WT of the tread band is 13%-19%.

[0005] Its core improvements are as follows: The tread groove is composed of tread groove 1a, tread groove 1b, and tread groove 1c, wherein tread groove 1a and tread groove 1b are connected, and tread groove 1b and tread groove 1c are spaced apart; tread groove 1a is defined on the tread belt A and the tread belt B, tread groove 1b is defined on the tread belt A2, and tread groove 1c is defined on the tread belt B and the tread belt C. The width of the pattern groove one is limited to 5mm-9mm; The ratio of the circumferential length 30z of tread groove one to the predetermined circumferential length J of tread module T is 16%-22%; wherein, the ratio of the circumferential length 30az to 30z of tread groove one a is 100%, the ratio of the circumferential length 30bz to 30z of tread groove one b is 9%-15%, and the ratio of the circumferential length 30cz to 30z of tread groove one c is 32%-38%. The ratio of the axial length 30h of tread groove one to the predetermined axial length WT of tread module T is 86%-92%; wherein, the ratio of the axial length 30ah of tread groove one to 30h is 50%-56%, the ratio of the axial length 30bh of tread groove one to 30h is 0%-2%, and the ratio of the axial length 30ch of tread groove one to 30h is 22%-28%. The angle 30ajd between pattern groove 1a and the equator XX is 59°-65°; the angle 30bjd between pattern groove 1b and the equator XX is between 67°-73°; the angle 30cjd between pattern groove 1c and the equator XX is 67°-73°.

[0006] The second tread groove is composed of tread groove 2a, tread groove 2b, and tread groove 2c. Tread groove 2a and tread groove 2b are spaced apart, while tread groove 2b and tread groove 2c are connected. Tread groove 2a is defined on the tread belts B and C, tread groove 2b is defined on the tread belt A, and tread groove 2c is defined on the tread belts A2, B, and C. The width of the second pattern groove is limited to 5.2mm-9mm; The ratio of the circumferential length 31z of the second tread groove to the predetermined circumferential length J of the tread module T is 22%-28%, wherein the ratio of the circumferential length 31az to 31z of the second tread groove a is 48%-54%, the ratio of the circumferential length 31bz to 31z of the second tread groove b is 15%-21%, and the ratio of the circumferential length 31cz to 31z of the second tread groove c is 53%-59%. The ratio of the axial length 31h of the second tread groove to the predetermined axial length WT of the tread module T is 100%. Among them, the ratio of the axial length 31ah of the second tread groove a to 31h is 26%-31%, the ratio of the axial length 31bh of the second tread groove b to 31h is 8%-13%, and the ratio of the axial length 31ch of the second tread groove c to 31h is 40%-45%. The angle 31ajd between the second groove of pattern 2a and the equator XX is 58°-63°; the angle 31bjd between the second groove of pattern 2b and the equator XX is 58°-63°; the angle 31cjd between the second groove of pattern 2c and the equator XX is 65°-70°.

[0007] The third tread groove is composed of tread groove 3a, tread groove 3b, tread groove 3c, and tread groove 3d. Tread groove 3a and tread groove 3b are spaced apart, tread groove 3b and tread groove 3c are connected, and tread groove 3c and tread groove 3d are spaced apart. Tread groove 3a is defined on the tread belts B and C, tread groove 3b is defined on the tread belt A1, tread groove 3c is defined on the tread belt A2, and tread groove 3d is defined on the tread belts B and C. The width of the pattern groove three is limited to 5.5mm-9.5mm; The ratio of the circumferential length 32z of the tread groove three to the predetermined circumferential length J of the tread module T is 26%-32%, wherein the ratio of the circumferential length 32az to 32z of the tread groove three a is 23%-29%, the ratio of the circumferential length 32bz to 32z of the tread groove three b is 0%-2%, the ratio of the circumferential length 32cz to 32z of the tread groove three c is 23%-29%, and the ratio of the circumferential length 32dz to 32z of the tread groove three d is 46%-51%. The ratio of the axial length 32h of the tread groove three to the predetermined axial length WT of the tread module T is 100%. Among them, the ratio of the axial length 32ah of the tread groove three a to 32h is 28%-34%, the ratio of the axial length 32bh of the tread groove three b to 32h is 0%-2%, the ratio of the axial length 32ch of the tread groove three c to 32h is 10%-15%, and the ratio of the axial length 32dh of the tread groove three d to 32h is 21%-26%. The angle 32ajd between the patterned groove 3a and the equator XX is 70°-75°; the angle 32bjd between the patterned groove 3b and the equator XX is 70°-75°; the angle 32cjd between the patterned groove 3c and the equator XX is 50°-55°; and the angle 32djd between the patterned groove 3d and the equator XX is 50°-55°.

[0008] The fourth tread groove is composed of tread groove 4a, tread groove 4b, and tread groove 4c. Tread groove 4a and tread groove 4b are connected, tread groove 4b and tread groove 4c are spaced apart and the gap is penetrated by tread groove 4c. Tread groove 4c and tread groove 4d are connected. Tread groove 4a and tread groove 4b are both defined on the tread belt A2, tread groove 4c is defined on the tread belt A2 and the tread belt B, and tread groove 4d is defined on the tread belt B. The width of the pattern groove in pattern groove four is limited to 5mm-13mm; The ratio of the circumferential length 33z of the tread groove four to the predetermined circumferential length J of the tread module T is 50%-56%, wherein the ratio of the circumferential length 33az to 33z of the tread groove four a is 0%-2%, the ratio of the circumferential length 33bz to 33z of the tread groove four b is 20%-25%, the ratio of the circumferential length 33cz to 33z of the tread groove four c is 0%-2%, and the ratio of the circumferential length 33dz to 33z of the tread groove four d is 35%-40%. The ratio of the axial length 33h of the tread groove four to the predetermined axial length WT of the tread module T is 13%-19%, wherein the ratio of the axial length 33ah to 33h of the tread groove foura is 19%-24%, the ratio of the axial length 33ah to 33h of the tread groove fourb is 0%-2%, the ratio of the axial length 33ah to 33h of the tread groove fourc is 0%-2%, and the ratio of the axial length 33ah to 33h of the tread groove fourd is 68%-74%. The angle 33ajd between the patterned groove 4a and the equator XX is 30°-36°; the angle 33bjd between the patterned groove 4b and the equator XX is 5°-11°; the angle 33cjd between the patterned groove 4c and the equator XX is 4°-10°; and the angle 33djd between the patterned groove 4d and the equator XX is 22°-27°.

[0009] Pattern groove five is composed of pattern groove five a and pattern groove five b connected together, wherein the interval between pattern groove three c and pattern groove three d is penetrated by pattern groove five b; pattern groove five a is defined on the sub-tread zone A2, and pattern groove five b is defined on the sub-tread zone B. The width of the five patterned grooves is limited to 5mm-10.5mm; The ratio of the length 34z of the tread groove five in the circumferential direction to the predetermined circumferential length J of the tread module T is 25%-31%, wherein the ratio of the length 34az to 34z of the tread groove five a in the circumferential direction is 81%-87%, and the ratio of the length 34bz to 34z of the tread groove five b in the circumferential direction is 13%-19%. The ratio of the axial length 34h of the tread groove five to the predetermined axial length WT of the tread module T is 21%-27%, wherein the ratio of the axial length 34ah to 34h of the tread groove five a is 93%-100%, and the ratio of the axial length 34ah to 34h of the tread groove five b is 0%-2%. The angle 34ajd between the patterned groove 5a and the equator XX is 35°-41°; the angle 34bjd between the patterned groove 5b and the equator XX is 5°-11°.

[0010] Pattern groove 6 is composed of pattern groove 6a and pattern groove 6b connected to each other, wherein the interval between pattern groove 3a and pattern groove 3b is penetrated by pattern groove 6b; pattern groove 6a and pattern groove 6b are both defined on the sub-tread zone A2. The width of the groove in the sixth groove is limited to 5.5mm-13mm; The ratio of the circumferential length 35z of the tread groove six to the predetermined circumferential length J of the tread module T is 48%-53%, wherein the ratio of the circumferential length 35az to 35z of the tread groove six a is 90%-95%, and the ratio of the circumferential length 35bz to 35z of the tread groove six b is 0%-2%. The ratio of the axial length 35h of the tread groove six to the predetermined axial length WT of the tread module T is 0%-2%, wherein the ratio of the axial length 35ah to 35h of the tread groove sixa is 53%-59%, and the ratio of the axial length 35ah to 35h of the tread groove sixb is 41%-46%. The angle 35ajd between the six grooves of pattern 6a and the equator XX is 3°-8°; the angle 35bjd between the six grooves of pattern 6b and the equator XX is 40°-45°.

[0011] By adopting the above scheme, the tread module T, composed of tread groove 1, tread groove 2, tread groove 3, tread groove 4, tread groove 5, and tread groove 6, is mirrored and alternately replicated along the circumferential direction of the tire, so that the tread grooves of the entire tread module T are crisscrossed, making the tire more grippy, better at draining water, more stable, and more traction.

[0012] The second technical problem to be solved by the present invention is to provide an improved tread pattern structure for off-road motorcycle tires. By further optimizing the cross-sectional shape of the tread grooves, the groove openings are narrowed due to compression when the tread grooves come into contact with the wheel surface, making it less likely for stones to get stuck in the grooves, thus solving the problem of existing tires affecting driving safety due to stones getting stuck.

[0013] To solve the above-mentioned technical problems, the technical solution of the present invention is implemented as follows: Based on the above scheme, the cross-sectional shape of the tread groove on the tread module T is designed as a wedge-shaped dovetail with a narrow top and a wide bottom, and multiple protrusions are arranged in a linear array along the length direction on both sides of the tread groove, wherein the surface of the protrusion is a circular arc surface.

[0014] By adopting the above solution, the grooves on the tire become narrower due to compression when they come into contact with the wheel surface, so stones are less likely to get stuck in the grooves; the protrusions can effectively block stones, so that the high-speed rotating tire will not reduce its grip and braking performance due to stones getting stuck.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: 1. Enhanced Performance: The tread module T includes three grooves (groove 1, groove 2, and groove 3) arranged on opposite sides relative to the tire's equator XX. These crisscrossing grooves significantly improve tire grip. The tread module T also includes three grooves (groove 4, groove 5, and groove 6) arranged on opposite sides relative to the tire's equator XX. These grooves penetrate the gaps between grooves 1, 2, and 3, further enhancing tire grip and stability, better meeting the needs of off-road motorcycles. 2. Driving safety: The cross-sectional shape of the tread grooves on the tread module T is a wedge-shaped dovetail with a narrow top and a wide bottom. When the tread grooves come into contact with the wheel surface, the groove openings are narrowed due to compression, so stones are less likely to get stuck in the grooves. Protrusions are set on both sides of the tread grooves. The protrusions can effectively block stones, so that the high-speed rotating tire will not reduce its grip and braking performance due to stones getting stuck. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a planar schematic diagram of the tire tread strip in Example 1; Figure 2 for Figure 1 A magnified view of a section of the central patterned groove 1; Figure 3 for Figure 1 A magnified view of a section of the second central patterned groove; Figure 4 for Figure 1 A magnified view of a section of the central patterned groove three; Figure 5 for Figure 1 A magnified view of a section of the central patterned groove four; Figure 6 for Figure 1 A magnified view of a section of the central patterned groove five; Figure 7 for Figure 1 A magnified view of a section of the six-groove pattern; Figure 8 This is a cross-sectional view of the patterned groove in Example 2.

[0018] Attached reference numerals: 1-Tire; 2-Tread strip; 3-Tread groove; 30-Tread groove one; 31-Tread groove two; 32-Tread groove three; 33-Tread groove four; 34-Tread groove five; 35-Tread groove six. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1, as Figure 1 As shown, an improved tread pattern structure for an off-road motorcycle tire is used on a tread belt 2, which is applied to an off-road motorcycle tire 1. The tire 1 has a land ratio of 80%-88%. The tread belt 2 includes sub-tread belts A, B, and C in the lateral direction from the center to both sides. Sub-tread belt A is the crown area, sub-tread belt B is the shoulder area, and sub-tread belt C is the sidewall area. Sub-tread belt A includes sub-tread belt A1 and sub-tread belt A2. Sub-tread belt A1 is the central part of sub-tread belt A, and sub-tread belt A2 is the other central part of sub-tread belt A.

[0021] like Figure 1 As shown, the tread belt 2 is composed of multiple identical tread modules T in the circumferential direction. The tread modules T are mirror-replicated along the circumferential direction of the tire 1 and have a predetermined circumferential length J. The tread modules T include tread grooves 30, 31, 32, 33, 34, and 35 arranged on opposite sides relative to the equator XX of the tire 1.

[0022] like Figure 1 As shown, the ratio of sub-tread belt A to the axial width WT of the entire tread belt 2 is 31%-37%; the ratio of sub-tread belt A1 to the axial width of the entire sub-tread belt A is 15%-22%; and the ratio of sub-tread belt C to the axial width WT of the entire tread belt 2 is 13%-19%.

[0023] like Figure 2 As shown, the tread groove 30 is composed of tread groove 30a, tread groove 30b, and tread groove 30c. Tread groove 30a and tread groove 30b are connected, while tread groove 30b and tread groove 30c are spaced apart. Tread groove 30a is defined on tread belt A and tread belt B, tread groove 30b is defined on tread belt A2, and tread groove 30c is defined on tread belt B and tread belt C.

[0024] Continue as Figure 2 As shown, the width of the groove in the groove-30 is limited to 5mm-9mm.

[0025] Continue as Figure 2As shown, the ratio of the length 30z of the tread groove 30 in the circumferential direction to the predetermined circumferential length J of the tread module T is 16%-22%; wherein, the ratio of the length 30az to 30z of the tread groove 30a in the circumferential direction is 100%, the ratio of the length 30bz to 30z of the circumferential direction of the tread groove 30b is 9%-15%, and the ratio of the length 30cz to 30z of the circumferential direction of the tread groove 30c is 32%-38%.

[0026] Continue as Figure 2 As shown, the ratio of the axial length 30h of the tread groove 30 to the predetermined axial length WT of the tread module T is 86%-92%; wherein, the ratio of the axial length 30ah of the tread groove 30a to 30h is 50%-56%, the ratio of the axial length 30bh of the tread groove 30b to 30h is 0%-2%, and the ratio of the axial length 30ch of the tread groove 30c to 30h is 22%-28%.

[0027] Continue as Figure 2 As shown, the angle 30ajd between the pattern groove 30a and the equator XX is 59°-65°; the angle 30bjd between the pattern groove 30b and the equator XX is between 67°-73°; and the angle 30cjd between the pattern groove 30c and the equator XX is 67°-73°.

[0028] like Figure 3 As shown, the second tread groove 31 is composed of the second tread groove 31a, the second tread groove 31b, and the second tread groove 31c. The second tread groove 31a and the second tread groove 31b are spaced apart, while the second tread groove 31b and the second tread groove 31c are connected. The second tread groove 31a is defined on the tread belts B and C, the second tread groove 31b is defined on the tread belt A, and the second tread groove 31c is defined on the tread belts A2, B, and C.

[0029] Continue as Figure 3 As shown, the width of the pattern groove 2 31 is limited to 5.2mm-9mm.

[0030] Continue as Figure 3 As shown, the ratio of the length 31z of the tread groove 2 31 in the circumferential direction to the predetermined circumferential length J of the tread module T is 22%-28%, wherein the ratio of the length 31az to 31z in the circumferential direction of the tread groove 2 31a is 48%-54%, the ratio of the length 31bz to 31z in the circumferential direction of the tread groove 2 31b is 15%-21%, and the ratio of the length 31cz to 31z in the circumferential direction of the tread groove 2 31c is 53%-59%.

[0031] Continue as Figure 3 As shown, the ratio of the axial length 31h of the second tread groove 31 to the predetermined axial length WT of the tread module T is 100%. Among them, the ratio of the axial length 31ah of the second tread groove 31a to 31h is 26%-31%, the ratio of the axial length 31bh of the second tread groove 31b to 31h is 8%-13%, and the ratio of the axial length 31ch of the second tread groove 31c to 31h is 40%-45%.

[0032] Continue as Figure 3 As shown, the angle 31ajd between the second pattern groove 31a and the equator XX is 58°-63°; the angle 31bjd between the second pattern groove 31b and the equator XX is 58°-63°; and the angle 31cjd between the second pattern groove 31c and the equator XX is 65°-70°.

[0033] like Figure 4 As shown, the tread groove 32 is composed of tread groove 32a, tread groove 32b, tread groove 32c, and tread groove 32d. Tread groove 32a and tread groove 32b are spaced apart, tread groove 32b and tread groove 32c are connected, and tread groove 32c and tread groove 32d are spaced apart. Tread groove 32a is defined on the tread belts B and C, tread groove 32b is defined on the tread belt A1, tread groove 32c is defined on the tread belt A2, and tread groove 32d is defined on the tread belts B and C.

[0034] Continue as Figure 4 As shown, the width of the groove in the three-dimensional groove is limited to 5.5mm-9.5mm.

[0035] Continue as Figure 4 As shown, the ratio of the length 32z of the tread groove 32 in the circumferential direction to the predetermined circumferential length J of the tread module T is 26%-32%, wherein the ratio of the length 32az to 32z in the circumferential direction of the tread groove 32a is 23%-29%, the ratio of the length 32bz to 32z in the circumferential direction of the tread groove 32b is 0%-2%, the ratio of the length 32cz to 32z in the circumferential direction of the tread groove 32c is 23%-29%, and the ratio of the length 32dz to 32z in the circumferential direction of the tread groove 32d is 46%-51%.

[0036] Continue as Figure 4As shown, the ratio of the axial length 32h of the tread groove 32 to the predetermined axial length WT of the tread module T is 100%. Specifically, the ratio of the axial length 32ah to 32h of the tread groove 32a is 28%-34%, the ratio of the axial length 32bh to 32h of the tread groove 32b is 0%-2%, the ratio of the axial length 32ch to 32h of the tread groove 32c is 10%-15%, and the ratio of the axial length 32dh to 32h of the tread groove 32d is 21%-26%.

[0037] Continue as Figure 4 As shown, the angle 32ajd between the pattern groove 32a and the equator XX is 70°-75°; the angle 32bjd between the pattern groove 32b and the equator XX is 70°-75°; the angle 32cjd between the pattern groove 32c and the equator XX is 50°-55°; and the angle 32djd between the pattern groove 32d and the equator XX is 50°-55°.

[0038] like Figure 5 As shown, the tread groove 33 is composed of tread groove 33a, tread groove 33b, and tread groove 33c. Tread groove 33a and tread groove 33b are connected, while tread groove 33b and tread groove 33c are spaced apart and the gap is penetrated by tread groove 31c. Tread groove 33c and tread groove 33d are connected. Tread groove 33a and tread groove 33b are both defined on the tread belt A2, tread groove 33c is defined on the tread belts A2 and B, and tread groove 33d is defined on the tread belt B.

[0039] Continue as Figure 5 As shown, the width of the groove in the patterned groove 433 is limited to 5mm-13mm.

[0040] Continue as Figure 5 As shown, the ratio of the length 33z of the tread groove 33 in the circumferential direction to the predetermined circumferential length J of the tread module T is 50%-56%, wherein the ratio of the length 33az to 33z in the circumferential direction of the tread groove 33a is 0%-2%, the ratio of the length 33bz to 33z in the circumferential direction of the tread groove 33b is 20%-25%, the ratio of the length 33cz to 33z in the circumferential direction of the tread groove 33c is 0%-2%, and the ratio of the length 33dz to 33z in the circumferential direction of the tread groove 33d is 35%-40%.

[0041] Continue as Figure 5As shown, the ratio of the axial length 33h of the tread groove 33 to the predetermined axial length WT of the tread module T is 13%-19%. Specifically, the ratio of the axial length 33ah to 33h of the tread groove 33a is 19%-24%, the ratio of the axial length 33ah to 33h of the tread groove 33b is 0%-2%, the ratio of the axial length 33ah to 33h of the tread groove 33c is 0%-2%, and the ratio of the axial length 33ah to 33h of the tread groove 33d is 68%-74%.

[0042] Continue as Figure 5 As shown, the angle 33ajd between the four grooves 33a and the equator XX is 30°-36°; the angle 33bjd between the four grooves 33b and the equator XX is 5°-11°; the angle 33cjd between the four grooves 33c and the equator XX is 4°-10°; and the angle 33djd between the four grooves 33d and the equator XX is 22°-27°.

[0043] like Figure 6 As shown, the tread groove 34 is composed of tread groove 34a and tread groove 34b connected together, wherein the interval between tread groove 32c and tread groove 32d is penetrated by tread groove 34b; tread groove 34a is defined on the tread belt A2, and tread groove 34b is defined on the tread belt B.

[0044] Continue as Figure 6 As shown, the width of the groove of the five-34 pattern is limited to 5mm-10.5mm.

[0045] Continue as Figure 6 As shown, the ratio of the length 34z of the tread groove 34 in the circumferential direction to the predetermined circumferential length J of the tread module T is 25%-31%, wherein the ratio of the length 34az to 34z of the tread groove 34a in the circumferential direction is 81%-87%, and the ratio of the length 34bz to 34z of the tread groove 34b is 13%-19%.

[0046] Continue as Figure 6 As shown, the ratio of the axial length 34h of the tread groove 34 to the predetermined axial length WT of the tread module T is 21%-27%, wherein the ratio of the axial length 34ah to 34h of the tread groove 34a is 93%-100%, and the ratio of the axial length 34ah to 34h of the tread groove 34b is 0%-2%.

[0047] Continue as Figure 6As shown, the angle 34ajd between the five grooves 34a and the equator XX is 35°-41°; the angle 34bjd between the five grooves 34b and the equator XX is 5°-11°.

[0048] like Figure 7 As shown, the tread groove 6 35 is composed of tread groove 6 35a and tread groove 6 35b connected to each other, wherein the interval between tread groove 3 32a and tread groove 3 32b is penetrated by tread groove 6 35b; tread groove 6 35a and tread groove 6 35b are both defined on the tread band A2.

[0049] Continue as Figure 7 As shown, the width of the groove in the patterned groove 635 is limited to 5.5mm-13mm.

[0050] Continue as Figure 7 As shown, the ratio of the length 35z of the tread groove 6 35 in the circumferential direction to the predetermined circumferential length J of the tread module T is 48%-53%, wherein the ratio of the length 35az of the tread groove 6 35a in the circumferential direction to 35z is 90%-95%, and the ratio of the length 35bz of the tread groove 6 35b in the circumferential direction to 35z is 0%-2%.

[0051] Continue as Figure 7 As shown, the ratio of the axial length 35h of the tread groove 6 35 to the predetermined axial length WT of the tread module T is 0%-2%, wherein the ratio of the axial length 35ah to 35h of the tread groove 6 35a is 53%-59%, and the ratio of the axial length 35ah to 35h of the tread groove 6 35b is 41%-46%.

[0052] Continue as Figure 7 As shown, the angle 35ajd between the pattern groove 6 35a and the equator XX is 3°-8°; the angle 35bjd between the pattern groove 6 35b and the equator XX is 40°-45°.

[0053] Example 2, as Figure 8 As shown, the difference between this embodiment and Embodiment 1 is only that, based on Embodiment 1, the cross-sectional shape of the tread groove 3 on the tread module T is designed as a wedge-shaped dovetail with a narrow top and a wide bottom. When the tread groove 3 on the tire 1 comes into contact with the wheel surface, the groove opening narrows due to compression, so stones are less likely to get stuck in the groove. Furthermore, multiple protrusions are provided on the two side walls of the tread groove 3 in a linear array along its length direction. The surface of the protrusions is an arc surface, which can effectively block stones, so that the high-speed rotating tire 1 will not reduce its grip and braking performance due to stones getting stuck.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An improved tread pattern structure for an off-road motorcycle tire, used on a tread belt, wherein the tread belt comprises, in the transverse direction, sub-tread belt A, sub-tread belt B, and sub-tread belt C sequentially from the center to both sides; the sub-tread belt A comprises sub-tread belt A1 and sub-tread belt A2, wherein sub-tread belt A1 is the central portion of sub-tread belt A, and sub-tread belt A2 is the other central portion of sub-tread belt A; The tread belt is composed of multiple identical tread modules T in the circumferential direction. The tread modules T are mirror-replicated alternately along the circumferential direction of the tire and have a predetermined circumferential length J. The tread module T includes tread groove one, tread groove two and tread groove three arranged on opposite sides relative to the equator XX of the tire. Its features are: The tread groove is composed of tread groove a, tread groove b, and tread groove c, wherein tread groove a and tread groove b are connected, and tread groove b and tread groove c are spaced apart; tread groove a is defined on tire tread belt A and tire tread belt B, tread groove b is defined on tire tread belt A2, and tread groove c is defined on tire tread belt B and tire tread belt C; The second tread groove is composed of tread groove a, tread groove b, and tread groove c, wherein tread groove a and tread groove b are spaced apart, and tread groove b and tread groove c are connected; tread groove a is defined on the tire tread belt B and tire tread belt C, tread groove b is defined on the tire tread belt A, and tread groove c is defined on the tire tread belt A2, tire tread belt B, and tire tread belt C; The tread groove three is composed of tread groove three a, tread groove three b, tread groove three c, and tread groove three d. Tread groove three a and tread groove three b are spaced apart, tread groove three b and tread groove three c are connected, and tread groove three c and tread groove three d are spaced apart. Tread groove three a is defined on the tire tread belts B and C, tread groove three b is defined on the tire tread belt A1, tread groove three c is defined on the tire tread belt A2, and tread groove three d is defined on the tire tread belts B and C.

2. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The ratio of sub-tread belt A to the axial width WT of the entire tread belt is 31%-37%; the ratio of sub-tread belt A1 to the axial width of the entire sub-tread belt A is 15%-22%. The ratio of the sub-tread band C to the axial width WT of the entire tread band is 13%-19%.

3. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The width of the pattern groove one is limited to 5mm-9mm; The ratio of the circumferential length 30z of the first tread groove to the predetermined circumferential length J of the tread module T is 16%-22%; wherein, the ratio of the circumferential length 30az to 30z of the first tread groove a is 100%, the ratio of the circumferential length 30bz to 30z of the first tread groove b is 9%-15%, and the ratio of the circumferential length 30cz to 30z of the first tread groove c is 32%-38%. The ratio of the axial length 30h of the first tread groove to the predetermined axial length WT of the tread module T is 86%-92%; wherein, the ratio of the axial length 30ah of the first tread groove a to 30h is 50%-56%, the ratio of the axial length 30bh of the first tread groove b to 30h is 0%-2%, and the ratio of the axial length 30ch of the first tread groove c to 30h is 22%-28%. The angle 30ajd between the pattern groove a and the equator XX is 59°-65°; the angle 30bjd between the pattern groove b and the equator XX is between 67°-73°; and the angle 30cjd between the pattern groove c and the equator XX is 67°-73°.

4. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The width of the second pattern groove is limited to 5.2mm-9mm; The ratio of the length 31z of the second tread groove in the circumferential direction to the predetermined circumferential length J of the tread module T is 22%-28%, wherein the ratio of the length 31az to 31z in the circumferential direction of the second tread groove a is 48%-54%, the ratio of the length 31bz to 31z in the circumferential direction of the second tread groove b is 15%-21%, and the ratio of the length 31cz to 31z in the circumferential direction of the second tread groove c is 53%-59%. The ratio of the axial length 31h of the second tread groove to the predetermined axial length WT of the tread module T is 100%. Among them, the ratio of the axial length 31ah of the second tread groove a to 31h is 26%-31%, the ratio of the axial length 31bh of the second tread groove b to 31h is 8%-13%, and the ratio of the axial length 31ch of the second tread groove c to 31h is 40%-45%. The angle 31ajd between the second groove of the pattern and the equator XX is 58°-63°; the angle 31bjd between the second groove of the pattern and the equator XX is 58°-63°; and the angle 31cjd between the second groove of the pattern and the equator XX is 65°-70°.

5. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The width of the pattern groove three is limited to 5.5mm-9.5mm; The ratio of the length 32z of the tread groove three in the circumferential direction to the predetermined circumferential length J of the tread module T is 26%-32%, wherein the ratio of the length 32az to 32z in the circumferential direction of tread groove three a is 23%-29%, the ratio of the length 32bz to 32z in the circumferential direction of tread groove three b is 0%-2%, the ratio of the length 32cz to 32z in the circumferential direction of tread groove three c is 23%-29%, and the ratio of the length 32dz to 32z in the circumferential direction of tread groove three d is 46%-51%. The ratio of the axial length 32h of the tread groove three to the predetermined axial length WT of the tread module T is 100%. Specifically, the ratio of the axial length 32ah of tread groove three a to 32h is 28%-34%, the ratio of the axial length 32bh of tread groove three b to 32h is 0%-2%, the ratio of the axial length 32ch of tread groove three c to 32h is 10%-15%, and the ratio of the axial length 32dh of tread groove three d to 32h is 21%-26%. The angle 32ajd between the pattern groove 3a and the equator XX is 70°-75°; the angle 32bjd between the pattern groove 3b and the equator XX is 70°-75°; the angle 32cjd between the pattern groove 3c and the equator XX is 50°-55°; and the angle 32djd between the pattern groove 3d and the equator XX is 50°-55°.

6. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The tread module T also includes tread grooves arranged on opposite sides relative to the equatorial plane XX of the tire; The fourth tread groove is composed of tread groove a, tread groove b, and tread groove c. Tread groove a and tread groove b are connected, tread groove b and tread groove c are spaced apart and the gap is penetrated by tread groove c, and tread groove c and tread groove d are connected. Tread groove a and tread groove b are both defined on the tire tread belt A2, tread groove c is defined on the tire tread belt A2 and the tire tread belt B, and tread groove d is defined on the tire tread belt B. The width of the pattern groove four is limited to 5mm-13mm; The ratio of the length 33z of the tread groove four in the circumferential direction to the predetermined circumferential length J of the tread module T is 50%-56%, wherein the ratio of the length 33az to 33z in the circumferential direction of tread groove four a is 0%-2%, the ratio of the length 33bz to 33z in the circumferential direction of tread groove four b is 20%-25%, the ratio of the length 33cz to 33z in the circumferential direction of tread groove four c is 0%-2%, and the ratio of the length 33dz to 33z in the circumferential direction of tread groove four d is 35%-40%. The ratio of the axial length 33h of the tread groove four to the predetermined axial length WT of the tread module T is 13%-19%, wherein the ratio of the axial length 33ah to 33h of the tread groove four a is 19%-24%, the ratio of the axial length 33ah to 33h of the tread groove four b is 0%-2%, the ratio of the axial length 33ah to 33h of the tread groove four c is 0%-2%, and the ratio of the axial length 33ah to 33h of the tread groove four d is 68%-74%. The angle 33ajd between the four grooves a and the equator XX is 30°-36°; the angle 33bjd between the four grooves b and the equator XX is 5°-11°; the angle 33cjd between the four grooves c and the equator XX is 4°-10°; and the angle 33djd between the four grooves d and the equator XX is 22°-27°.

7. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The tread module T also includes five tread grooves arranged on opposite sides relative to the equatorial plane XX of the tire; The tread groove five is formed by the interconnection of tread groove five a and tread groove five b, wherein the interval between tread groove three c and tread groove three d is penetrated by tread groove five b; tread groove five a is defined on the sub-tread belt A2, and tread groove five b is defined on the sub-tread belt B. The width of the pattern groove five is limited to 5mm-10.5mm; The ratio of the length 34z of the tread groove five in the circumferential direction to the predetermined circumferential length J of the tread module T is 25%-31%, wherein the ratio of the length 34az to 34z of the tread groove five a in the circumferential direction is 81%-87%, and the ratio of the length 34bz to 34z of the tread groove five b in the circumferential direction is 13%-19%. The ratio of the axial length 34h of the tread groove five to the predetermined axial length WT of the tread module T is 21%-27%, wherein the ratio of the axial length 34ah of the tread groove five a to 34h is 93%-100%, and the ratio of the axial length 34ah of the tread groove five b to 34h is 0%-2%. The angle 34ajd between the five grooves of the pattern 5a and the equator XX is 35°-41°; the angle 34bjd between the five grooves of the pattern 5b and the equator XX is 5°-11°.

8. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The tread module T also includes tread grooves arranged on opposite sides relative to the equatorial plane XX of the tire; The tread groove six is ​​formed by the interconnection and combination of tread groove six a and tread groove six b, wherein the interval between tread groove three a and tread groove three b is penetrated by tread groove six b; tread groove six a and tread groove six b are both defined on the tread belt A2 of the tire. The width of the groove in the sixth groove is limited to 5.5mm-13mm; The ratio of the circumferential length 35z of the tread groove six to the predetermined circumferential length J of the tread module T is 48%-53%, wherein the ratio of the circumferential length 35az to 35z of the tread groove six a is 90%-95%, and the ratio of the circumferential length 35bz to 35z of the tread groove six b is 0%-2%. The ratio of the axial length 35h of the tread groove six to the predetermined axial length WT of the tread module T is 0%-2%, wherein the ratio of the axial length 35ah of the tread groove six a to 35h is 53%-59%, and the ratio of the axial length 35ah of the tread groove six b to 35h is 41%-46%. The angle 35ajd between the six grooves of the pattern sixa and the equator XX is 3°-8°; the angle 35bjd between the six grooves of the pattern six and the equator XX is 40°-45°.

9. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The tread band is applied to off-road motorcycle tires, and the tire's tread ratio is 80%-88%.

10. The improved tread pattern structure of the off-road motorcycle tire according to claim 1, characterized in that: The tread groove on the tread module T has a wedge-shaped dovetail shape that is narrow at the top and wide at the bottom. Multiple protrusions are arranged in a linear array along the length of the tread groove on both sides of the tread groove, and the surface of the protrusions is an arc surface.

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